So, I got the 64GB aluminum version, it arrived a day after I placed my order. I set it up and let it install its OS update, which took forever, then I started to use it. Right away I noticed that the top speaker seemed louder than the bottom speaker when the phone was playing notification sounds. In two phone calls, people complained that it sounded like I was underwater or had them on speakerphone.
I was a little concerned by the speaker issue, so I took the time to play back audio from NPR and then tried a few videos. While playing back video, I flipped the phone this way and that, and moved the phone back and forth from ear to ear just to make sure I wasn't deaf in one ear. The top speaker was definitely much louder than the other. With the mic being housed with the bottom speaker, I'm lead to believe both issues are related.
I contacted customer support and the lady who took my call said that another user had called with the same issue, but she couldn't recall which model they had. She had spoken with the design team about this and they said it was a defect, that both speakers should be firing at the same volume level.
We did the mandatory factory reset and I fired up YouTube - then I moved my old phone back and forth over the speakers of the 6P and she could hear the difference too, so I ended up mailing it back for a refund - I plan to buy another, but an exchange would entail a $549 hold on my bank account, so a refund it is.
So, that said, I'm curious - has anyone else had this issue? I searched the web but didn't find anything, but I've tweeted to some people who were opening new devices and one of them said he felt the top speaker was louder on his unit too (I didn't say which speaker, I just asked if one was louder than the other), while another person said she'd follow up.